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JAMESV B. STRICKLAND, 0F sonANfroN,l PENNSYLVANIA.

Letters Patent No. 64,922, dated May 2l., 1867.

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TO ALL WHOM I'I MAY CONCERN:

Beit known that I, JAMES B. STRICKLAND, of Scranton, in the county ofLuzerne, and State of Pennsyl- Vania, have invented a new and improvedAdjustable Eccentric; and I do hereby declare that the following is afull, clear, .and exact description thereof, which will enablev thoseskilled in the art to make and use the same, reference being had to theaccompanying drawings forming part of this specification.

This improvement relates to the manner'in which an eccentric is securedto the shaft or axle of a locomotive or other engine, and to the mannerin which it may be changed to suit the lead of the engine-valve. And theinvention consists in attaching to the axle a collar with a. projectingarm, which arm has a curved slot through it, es will be hereinafter morefully described.

Figure l. represents e side view showing the collar and arm and twoeccentrics on the axle.

Figure 2 is an edge View of the same, it being a. section through theline :c n: of iig. I.

Similar letters of reference indicate corresponding parts.

4 A represents the shaft or axle; B is'the collar; and C is the arm onthe collar; D is a curved slot through the arm; E is one of theeccentrics 'which is held in placeA directly bythe arm G; F is theother' eccentric, which is held in place by E; G is a curved slotthrough the eccentric E. The collar B is tted on to the axle, andfastened against a. shoulder by a key. The projecting arm C, which isone piece with the collar, has a. curved slot through it, 'the curvebeing a circle, whose centre is the centre of the axle. The eccentric Eis fastened .to tbe arm by a bolt,iwhose. head is countersunke Hush withthe opposite side oi' the eccentric, and

` which passes through the slot with a, nut on the end which bearsagainst the arm. The ecccntrics are both plain disks of metal tted on tothe axle but allowed to turn upon it Whenever it is desired to move oralter them. There is also a curved slot through the eccentric E, and theother eccentric is fastened toE in the same manner that E is fastened tothe arm. J represents the bolts by which both eccentrics are fastened,and in the sectional view the manner in which the head is countersunk isplainly shown. vIt will be understood from what has been said that theeccentric-plates E and F een be moved or adjusted as may be desired orto the extent of the slot, andthat they can' be held inposition by thebolts, as before described.

The advantages of this arrangement are man'y, and must be obvious to allwho are acquainted with the steam engine.

Having thus described my invention, what I claim asnew, and desire tosecure by Letters Patent, is

The combination and arrangement of tbe collar and arm B C, and theeccentrica E F, substantially as herein shown and described for thepurposes set forth.

I JAMES B. STRICKLAND.

Witnesses:

STEPHEN JONES, JOSEPH Bunn.

